I'd recommend checking out Sportsbet.io depending on the type of bet you want to play. They have sports, esports and a pretty big casino. I've played with them using a VPN before but there is always going to be a slight risk that any online casino will ask for KYC information and they might seize your winnings based on your documentation. You're best off trying to find a casino within your country (if not the USA) and that way it is less likely to cause problems down the line. If you give an idea of where you are - like Asia, Europe, Africa, etc. then it might help narrow down the options available to you.